Bosch Climate 5000 Series User manual

Bosch Four Way Cassette Ductless Single Split
Air Conditioner / Heat Pump
Climate 5000 Series
Installation Manual

2 |Bosch Climate 5000 Series Four Way Cassette Ductless Single Split Air Conditioner / Heat Pump Installation Manual
04.2019 |Bosch Thermotechnology Corp.
Data subject to change

Installation Manual Bosch Climate 5000 Series Four Way Cassette Ductless Single Split Air Conditioner / Heat Pump | 3
Bosch Thermotechnology Corp. |04.2019 Data subject to change
Table of Contents
1 Key to Symbols and Safety Instructions 4
1.1 Key to Symbols 4
1.2 Safety 4
2 Components 6
2.1 Mandatory accessories 6
3 Installation Summary 7
4 Unit parts 8
5 Indoor Unit Installation 9
5.1 Selecting Installation Site 9
5.2 Applicable Models : 9k - 18k 10
5.3 Applicable Models : 24k - 48k 11
5.4 Installing the indoor unit 12
6 Connecting the Drain Pipe 13
6.1 Installation of Drain Piping 13
6.2 Install the Drain Pipes 13
6.3 How to Perform Piping 13
6.4 Testing of Drain Piping 14
7 Outdoor Unit Installation 15
7.1 Select Installation Location 15
7.2 Install Drain Joint 16
7.3 Anchor Outdoor Unit 17
8 Refrigerant Piping Connection 18
8.1 Connection Instructions – Refrigerant Piping 18
8.2 Connecting Piping to Indoor Unit 20
8.3 Connecting Tubing to Outdoor Unit 21
8.4 Pipe Insulation 21
9 Connecting Signal and Power Cables 22
9.1 How to Connect Wiring 23
10 Air Evacuation 25
10.1 Preparations and Precautions 25
10.2 Evacuation Instructions 25
10.3 Adding Refrigerant 26
11 Installation of the Decorative Panel 27
11.1 Remove Front Grille 27
11.2 Remove Corner Covers of the Panel 27
11.3 Install the Decorative Panel 27
11.4 Mount the Intake Grille 28
11.5 Connect2wiresofdecorativepaneltomainboard of theunit 28
11.6 Fasten the Control Box Lid with 2 Screws 28
11.7 Close the Intake Grille and Close the 2 Grille Hooks 28
11.8 Attach Four Corner Covers by Pushing Them Inwards 29
12 Electrical and Gas Leak Checks 29
12.1 Electrical Safety Checks 29
12.2 Gas Leak Checks 29
13 Test Operation 30
14 Disposal guidelines 30

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1 Key to Symbols and Safety Instructions
1.1 Key to Symbols
Warnings
Warnings in this document are identified by a
warning triangle printed against a grey background.
Keywords at the start of a warning indicate the type and seriousness
of the ensuing risk if measures to prevent the risk are not taken.
The following keywords are defined and can be used in this document:
DANGER indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could
result in minor to moderate injury.
NOTICE is used to address practices not related to personal injury.
Important information
This symbol indicates important information where
there is no risk to people or property.
1.2 Safety
Please read safety precautions before installation
Incorrect installation due to ignoring instructions can cause serious damage or
injury.
WARNING: ELECTRICAL HAZARD
Do not modify the length of the power supply cord or use an
extension cord to power the unit.
Do not share the electrical outlet with other appliances.
Improper or insufficient power supply can cause fire or
electrical shock.
WARNING: INSTALLATION REQUIREMENTS
Installation must be performed by a licensed contractor,
and per the instructions in the installation manual. Improper
installation can cause water leakage, electrical shock, or fire.
In North America, installation must be performed in
accordance with the requirement of NEC (National Electric
Code) and CEC (Canadian Electric Code) by licensed and
qualified personnel only.
Only contact a licensed contractor for repair or maintenance
of this unit.
Only use the included accessories, parts, and specified
parts for installation. Using non-standard parts can cause
water leakage, electrical shock, fire, and can cause the unit
to fail.
Install the unit in a solid location that can support the unit’s
weight. If the chosen location cannot support the unit’s
weight, or the installation is not done properly, the unit may
drop and cause serious injury and/or damage.
WARNING:
This product can expose you to chemicals including Lead
and Lead components, which are known to the State
of California to cause cancer and birth defects or other
reproductive harm. For more information go to www.
P65Warnings.ca.gov.

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WARNING: ELECTRICAL HAZARD
For all electrical work, follow all local and national wiring
standards, regulations, and the Installation Manual.
The power supply to the outdoor unit requires a service
disconnect at the unit. Only use a dedicated circuit. Never
share a power source connected to this system. Insufficient
electrical capacity or defects in electrical work can cause
electrical shock or fire.
For all electrical work, use the specified cables. Connect
cables tightly, and clamp them securely to prevent external
forces from damaging the terminal. Improper electrical
connections can overheat and cause fire, and may also
cause shock.
All wiring must be properly arranged to ensure that the
control board cover can close properly. If the control board
cover is not closed properly, it can lead to corrosion and
cause the connection points on the terminal to heat up,
catch fire, or cause electrical shock.
In certain functional environments, such as kitchens, server
rooms, etc., the use of specially designed air-conditioning
units is highly recommended.
If the power supply cord is damaged, it must be replaced
by the manufacturer, its service agent or similarly qualified
persons such as a licensed electrician in order to avoid a
hazard.
The product must be properly grounded at the time of
installation, or electrical shock may occur.
CAUTION: BURN HAZARD
For units that have an auxiliary electric heater, do not
install the unit within 1 meter (3 feet) of any combustible
materials.
Do not install the unit in a location that may be exposed
to combustible gas leaks. If combustible gas accumulates
around the unit, it may cause fire.
Do not operate your air conditioner in a wet room such as a
bathroom or laundry room. Too much exposure to water can
cause electrical components to short circuit.
NOTICE: PROPERTY DAMAGE
Install condensate drainage piping according to the
instructions in this manual. Improper condensate drainage
may cause water damage to your home and property.
CAUTION: CONTAINS REFRIGERANT
This air-conditioning unit contains fluorinated gases. For
specific information on the type of gas and the amount,
please refer to the relevant label on the outdoor unit itself.
Installation, service, maintenance and repair of this unit
must be performed by a certified technician.
Product removal and recycling must be performed by a
certified technician.
If the system has a leak-detection system installed, it must
be checked for leaks at least every 12 months.
When the unit is checked for leaks, proper record-keeping of
all checks is strongly recommended.

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04.2019 |Bosch Thermotechnology Corp.
Data subject to change
2 Components
The air conditioning / heat pump system comes with the following components. Use
all of the installation parts and components to install the system.
Name Image Quanity
Outlet pipe sheath 1
Metal champ 1
Drain joint 1
Seal ring 1
Tapping screws M3×10mm (On some models) 2
Drain Hose 1
Copper nut
(Used to make the connective pipes between indoor and outdoor units) 2
Magnetic ring
(Wrap the electric wires S1 & S2 ( P & Q & E ) around the magnetic ring
twice) - 36k & 48k models only S1&S2(P&Q&E)
1
Magnetic ring
(Hitch it on the connective cable between indoor unit and outdoor unit
after installation.) - 48k model only
1
Remote controller 1
Fixing screw for remote controller holder ST2.9 x 10 2
Remote controller holder 1
Dry battery AAA 2
Owner’s manual —— 1
Installation manual —— 1
Table 1
2.1 Mandatory accessories
This indoor unit requires installation of a decorative panel.
Part # Description
8733953125 Compact Cassette Grille - 9K ~ 18K
8733953126 Cassette Grille - 24K ~ 48K
Table 2
WARNING: ELECTRICAL HAZARD
Improper installation may result in water leakage, electrical
shock and fire, or cause the equipment to fail.

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3 Installation Summary
Figure 1
LN
1
MC MC
5
6
78
Install the indoor unit
(Page 9)
INSTALLATION ORDER
3
Install the outdoor unit
(Page 15)
2
Install the drainpipe
(Page 13)
Connect the wires
(Page 22)
4
Connect the refrigerant pipes
(Page 18)
Evacuate the refrigeration system
(Page 25)
Install the front panel
(Page 27)
Perform a test run
(Page 29)

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4 Unit parts
Figure 2
Drain pump
(within indoor unit)
Drain pipe
Air inlet
Display panel
Front grille
Louver
Refrigerant pipe
Air outlet
Illustrations in this manual are for explanatory purposes. The actual
shape of your indoor unit may be slightly different. The actual shape shall
prevail.

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5 Indoor Unit Installation
5.1 Selecting Installation Site
When the conditions in the ceiling exceeds 30°C (86°F) with a relative humidity of
80%, or when fresh air needs to be introduced to the space, additional insulation is
required (minimum 10 mm (0.4in) thickness, polyethylene foam).
Before installing the indoor unit, refer to the label on the product box to
make sure that the model number of the indoor unit pairs with the model
number of the outdoor unit.
Step 1: Select installation location
Before installing the indoor unit, you must choose an appropriate location. The
following are standards that will help you choose an appropriate location for the
unit.
Proper installation locations meet the following standards:
—Good air circulation
—Convenient drainage of condensate
—Noise from the unit will not disturb other people
—Firm and solid—the location will not vibrate
—Strong enough to support the weight of the unit
—A location at least three feet from all other electrical devices (e.g.,
TV, radio, computer)
—Flat horizontal ceiling
—Sufficient clearance for maintenance and service
DO NOT install unit in the following locations:
—Near any source of heat, steam, or combustible gas
—Near flammable items such as curtains or clothing
—Near any obstacle that might block air circulation
—Near the doorway
—In a location subject to direct sunlight
Step 2: Check required space
Install this unit where the height of bottom panel is more than 2.5m (8.2ft) from
ground. Please refer to below figure for more information.
Step 3: Install the suspension bolt
(Use either a M8-M10 size bolt or the equivalent). Use a hole-in anchor for existing
ceiling, and a sunken insert, sunken anchor or other field supplied parts for new
ceilings to reinforce the ceiling to hold the weight of the unit and related parts. All
the above parts and field supplied.
Figure 3
30-35mm
(1.2-1.4in)
unit:mm (in)
Anchor
Ceiling slab
Installation Example
Long nut or turn-buckle
Suspension bolt
False ceiling
Recommended Distances Between the Indoor Unit and The Ceiling
The distance between the mounted indoor unit and the internal ceiling should meet
the following specifications.
Figure 4
Front panel
Ground
Ceiling
board
>2.5m / 8.2’
C(Ceiling hole)
Ceiling
Connecting point of
refrigerant pipe
(liquid side)
Connecting
point of
refrigerant pipe
(gas side)
Connecting point
of drain pipe
A
H
Model A(mm/in) H (mm/in) C (mm/in)
9k - 18k 260/10.2 290/11.4 or more 600/23.6
24k 205/8.0 235/9.3 or more 880/34.5
36k 245/9.6 275/10.8 or more 880/34.5
48k 287/11.3 317/12.5 or more 880/34.5
Table 3
WARNING: CONTAINS REFRIGERANT
Do not install the unit in an area where flammable materials
are present due to risk of explosion resulting in serious
injury or death.
WARNING: PROPERTY DAMAGE/SYSTEM FAILURE
If the base is not strong enough to support the weight of the
unit, the unit could fall out of place and cause serious injury.

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5.2 Applicable Models : 9k - 18k
Figure 5
1
1
2
2
3
3
545/21.5in
523/20.6in
570/22.4in
570/22.4in
647/25.5in
647/25.5in
45
70/2.8in
15/0.6in
or more
600/23.6in6
78
20/0.8in 20/0.8in
Unit:mm/in
15/0.6in
or more
1. Installation hook
2. Indoor unit dimensions
3. Decorative panel dimensions
4. Refrigerant pipe
5. Hanging bolt location (X4)
6. Ceiling opening dimensions
7. Hanger bracket
8. False ceiling
Figure 6
1000/39.4in
or more
Unit: mm/in
1000/
39.4in
or more
1000/39.4in or more
1000/ 39.4in or more
Adjust the position to ensure the gaps between the indoor unit and the four sides of
false ceiling are even. The indoor unit's lower part should sink into the false ceiling
for 24mm / 0.9in.
Figure 7
1 Indoor unit
2 False ceiling
1
2
24mm
0.9in
If the spacing between ceiling and the unit is over 20 mm / 0.8in, attach
sealing material in the part or recover the ceiling.

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5.3 Applicable Models : 24k - 48k
Figure 8
24-48K ceiling hole size
Refrigerant piping side Drain hose side
78cm / 30in (Suspension bolt)
84cm / 33in(Body)
95cm / 37.4in(Ceiling opening)
68cm / 26in
(Suspension bolt)
84cm / 33in (Body)
95cm / 37.4in (Ceiling opening)
Figure 9
>1m / 39in
>1m / 39in
>1m / 39in
>1m / 39in
Figure 10
Ceiling board
Main body
10 - 18mm (0.4-0.7”)
L
The bottom of the unit should be 10 - 18mm (0.4-0.7in) higher than the
ceiling board. Generally, L (indicated in Fig. 10) should be half the
length of the suspension bolt or long enough to prevent the nuts from
coming off.

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5.4 Installing the indoor unit
Depending on the field conditions, it may be easier to install optional accessories
before the indoor unit is installed (except for the decoration panel). However,
for existing ceiling, install fresh air inlet component kit and branch duct before
installing the unit.
Step 1: Install the indoor unit temporarily
Attach the hanger bracket to the suspension bolt. Be sure to fix it securely
by using a nut and washer from the upper and lower sides of the hanger
bracket.
To secure the hanger bracket see figure below.
Figure 11
1
2
3
4
1. Nut (field supplied)
2. Washer (field supplied)
3. Hanger bracket
4. Double nuts (field supplied)
Adjust the unit to the right position for installation
Step 2: Check that the unit is horizontally level
Do not install the unit tilted. The indoor unit is equipped with a built-in
drain pump and float switch. (If the unit is tilted against the direction of
the condensate flow (the drain piping side is raised), the float switch may
malfunction and cause water to drip.)
Check if the unit is levelled at all four corners with a water level or a water-
filled vinyltube as shown in figure 12.
Figure 12
11
22
1. Water level
2. Vinyl tube

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6 Connecting the Drain Pipe
6.1 Installation of Drain Piping
Install the drain piping as shown in figure below and take measures against
condensation. Improperly rigged piping could lead to leaks and damage other
products.
Figure 13
1-1.5m 1
2
√
×
3~5ft
1. Hanging bar
2. ≥1/100 gradient
6.2 Install the Drain Pipes
Keep piping as short as possible and slope it downwards at a gradient of at
least 1/100 so that air may not remain trapped inside the pipe.
Keep pipe size equal to or greater than that of the connecting pipe (PVC
pipe, nominal diameter 20mm/0.8in in, outside diameter 25mm/1in).
Push the drain hose as far as possible over the drain socket, and tighten
the metal clamp securely.
Figure 14
12 34
1. Drain socket (attached to the unit)
2. Metal clamp
3. Drain hose
4. Insulation (field supplied)
Insulate the drain hose inside the building.
If the drain hose cannot be sufficiently set on a slope, fit the hose with
drain raising piping (field supplied).
Make sure that heat insulation work is executed on the following 2 spots to
prevent any possible water leakage due to dew condensation.
—Indoor drain pipe
—Drain socket.
6.3 How to Perform Piping
Figure 15
1
2
0~75 mm
5
1~1.5m
30cm/11.8in
or less
654
3
22cm/ 8.7in
75cm/29.5in or less
0~3in
53cm/ 20.9in
3~5ft
1. Ceiling slab
2. Hanger bracket
3. Adjustable range
4. Drain raising pipe
5. Drain hose
6. Metal clamp
Connect the drain hose to the drain raising pipes and insulate them.
Connect the drain hose to the drain outlet on the indoor unit and tighten it
with the clamp.
Precautions
Install the drain raising pipes at a height of less than 530 mm /20.9 in.
Install the drain raising pipes at a right angle to the indoor unit and no
more than 300 mm/11.8 in from the unit.
To prevent air bubbles, install the drain hose level or slightly tilted up (<75
mm/3 in).
The incline of drain hose should be 75 mm/3 in or less so that the drain
socket does not have to withstand additional force.
To ensure a downward slope of 1:100, install hanging bars every 1m/3.3ft
to 1.5 m/4.9ft.
When unifying multiple drain pipes, install the pipes as shown in figure 16.
Select converging drain pipes whose gauge is suitable for the operating
capacity of the unit.

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Data subject to change
Figure 16
0- 53cm (21in)
10cm (4in)
1
1
1. T-joint converging drain pipes
NOTICE:
Drain piping connections. Do not connect the drain piping
directly to sewage pipes that smell of ammonia. The
ammonia in the sewage might enter the indoor unit through
the drain pipes and corrode the heat exchanger.
The drain hose should not be curved or screwed. The curved
or screwed hose may cause water leakage.
6.4 Testing of Drain Piping
After the piping work is finished, check if drainage flows smoothy.
Add approximately 1L of water gradually through the air discharge outlet.
Method of adding water is shown below in figure 17.
Figure 17
12
10cm/3.9in
or more
Fresh air intake (⌀6.5cm/2.6in)
10.6cm/
4.2in
10.6cm/4.2in
⌀7.5cm/3in
⌀6.5cm/2.6in
1. Plastic watering can (tube should be about 10cm/3.9in long)
2. Water-receiver
When electric wiring work is finished, check drainage flow during COOL
operation, explained in "Test Operation" in Section 13.

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7 Outdoor Unit Installation
7.1 Select Installation Location
Before installing the outdoor unit, you must choose an appropriate location. The
following are standards that will help you choose an appropriate location for the
unit.
Proper installation locations meet the following standards:
—Meets all spatial minimum requirements shown in Installation Space
Requirements (Figure 18)
Figure 18
evoba)ni42
(
mc
0
6
60cm (24in)
on right
30cm (12in)
on left
200cm (79in)
in front
30cm (12in)
from back wall
—Good air circulation and ventilation
—Firm and solid—the location can support the unit and will not vibrate
—Noise from the unit will not disturb others
—Protected from prolonged periods of direct sunlight or rain
DO NOT install unit in the following locations:
—Near an obstacle that will block air inlets and outlets
—Near a public street, crowded areas, or where noise from the unit
will disturb others
—Near animals or plants that will be harmed by hot air discharge
—Near any source of combustible gas
—In a location that is exposed to large amounts of dust
—In a location exposed to excessive amounts of salty air
NOTICE
If the unit is exposed to heavy wind: Install unit so that air
outlet fan is at a 90° angle to the direction of the wind. If
needed, build a barrier in front of the unit to protect it from
extremely heavy winds. See Figures 19 and 20.
Figure 19
Strong wind
Strong wind
Figure 20
Strong
wind
Wind Baffle
NOTICE
This unit is not designed for application in areas frequently
exposed to salty air (seaside) conditions..

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NOTICE
When operating the air conditioner in a low outdoor ambient
temperature, be sure to follow the instructions described
below.
—To prevent exposure to wind, install the outdoor unit
with its suction side facing the wall.
—Never install the outdoor unit at a site where the
suction side may be exposed directly to wind.
—To prevent exposure to wind, it is recommended to
install a baffle plate on the air discharge side of the
outdoor unit.
—In heavy snowfall areas, select an installation site
where the snow will not affect the unit.
Figure 21
- Construct a large canopy.
- Construct a pedestal.
Install the unit high enough off the
ground to prevent burying in snow.
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7.2 Install Drain Joint
Heat pump units require a drain joint. Before bolting the outdoor unit in place,
you must install the drain joint at the bottom of the unit. Note that there are two
different types of drain joints depending on the type of outdoor unit.
If the drain joint comes with a rubber seal (see Figure 22, pos. A ), do the following:
1. Fit the rubber seal on the end of the drain joint that will connect to the
outdoor unit.
2. Insert the drain joint into the hole in the base pan of the unit.
3. Rotate the drain joint 90° until it clicks in place facing the front of the unit.
4. Connect a drain hose extension (not included) to the drain joint to redirect
water from the unit during heating mode.
If the drain joint doesn’t come with a rubber seal (see Figure 22, pos. B), do the
following:
1. Insert the drain joint into the hole in the base pan of the unit. The drain joint
will click in place.
2. Connect a drain hose extension (field supplied) to the drain joint to redirect
water from the unit during heating mode.
NOTICE
In cold climates, make sure that the drain hose is as vertical
as possible to ensure swift water drainage. If water drains
too slowly, it can freeze in the hose and flood the unit.
Figure 22
Seal
Drain joint
(A) (B)
Base pan hole of
outdoor unit
Seal

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7.3 Anchor Outdoor Unit
The outdoor unit can be anchored to to a commercially available mounting pad on
the ground or to a wall-mounted bracket (both sold separately).
Unit mounting dimensions
The following is a list of different outdoor unit sizes and the distance between their
mounting feet. Prepare the installation base of the unit according to the dimensions
below.
NOTICE: PROPERTY DAMAGE/SYSTEM FAILURE
Never mount this unit directly on the ground. It must be
anchored according to the guidance provided in these
instructions, and/or local building codes.
Outdoor Model OutdoorUnit Dimensions (mm/in) MountingDimensions
W x H x D Distance A (mm/in) Distance B (mm/in)
BMS500-AAS009-1CSXRA 770x555x300 (30.3x21.85x11.81) 487 (19.2) 298 (11.73)
BMS500-AAS012-0CSXRB, BMS500-AAS012-1CSXRA,
BMS500-AAS009-1CSXHB, BMS500-AAS012-1CSXHB 800x554x333 (31.5x21.8x13.1) 514 (20.24) 340 (13.39)
BMS500-AAS018-1CSXRA, BMS500-AAS018-1CSXHB,
BMS500-AAM018-1CSXRA 845x702x363 (33.27x27.6x14.3) 540 (21.26) 350 (13.8)
BMS500-AAS024-1CSXRA, BMS500-AAS024-1CSXHB,
BMS500-AAS030-1CSXRB,BMS500-AAS036-1CSXRB,
BMS500-AAS036-1CSXLB, BMS500-AAM027-1CSXRA
BMS500-AAM036-1CSXRA, BMS500-AAM027-1CSXHB,
BMS500-AAM036-1CSXHB
946x810x410 (37.24x31.9x16.14) 673 (26.5) 403 (15.87)
BMS500-AAS048-1CSXLB, BMS500-AAS060-1CSXLB,
BMS500-AAM048-1CSXRA, BMS500-AAM036-1CSXHB 952x1333x415 (37.5x52.5x16.34) 634 (24.96) 404 (15.9)
Table 4
Figure 23
Outdoor Unit

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8 Refrigerant Piping Connection
The length of refrigerant piping will affect the performance and energy
efficiency of the unit. Nominal efficiency is tested on units with a pipe
length of 5 meters (16.5ft). A minimum pipe run of 3 meters (9.8ft)
is required to minimize vibration & excessive noise. Refer to the table
below for specifications on the maximum length and drop height of
piping.
Maximum length and drop height of refrigerant piping per unit model
Model Capacity(BTU/h) Max. Equivalent
Length m (ft)
Max. Height
Variation m (ft)
R410A
Inverter
Split Air
Conditioner
< 15,000 25 (82ft) 10 (33ft)
15,000 to < 24,000 30 (98.5ft) 20 (66ft)
24,000 to < 36,000 50 (164ft) 25 (82ft)
36,000 to 48,000 65 (213ft) 30 (98.5ft)
Table 5
8.1 Connection Instructions – Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra care to cut and flare them properly.
This will ensure efficient operation and minimize the need for future maintenance.
1. Measure the distance between the indoor and outdoor units.
2. Using a pipe cutter, cut the pipe a little longer than the measured distance.
3. Make sure that the pipe is cut at a perfect 90° angle. Refer to Fig.24 for cut
examples.
Figure 24
Oblique Rough Warped
90°
NOTICE:
Be extra careful not to damage, kink, or deform the pipe
while cutting. This will drastically reduce the heating
efficiency of the unit.
NOTICE: SYSTEM FAILURE
If the indoor unit is installed higher than the outdoor unit,
it may cause liquid compression or deterioration of the oil
return. Oil traps in the rising gas piping can prevent this.
To prevent liquid compression or deterioration of the oil
return, an oil trap should be installed every 10m(32.8ft) of
vertical suction line riser.
Figure 25
The indoor unit is installed higher than the outdoor unit
Outdoor unit
Gas piping
Oil trap
Indoor unit
Liquid
piping
10m/32.8ft
10m/32.8ft
NOTICE: SYSTEM FAILURE
If the outdoor unit is installed higher than the indoor unit, it
is recommended that vertical suction risers not be up sized.
Proper oil return to the compressor should be maintained
with suction gas velocity. If velocities drop below7.62m/s
(1500 ft/min), oil return will be decreased.
An oil trap should be installed every 6m(20ft) of vertical
suction line riser.
Figure 26
The outdoor unit is installed higher than the indoor unit
Outdoor unit
Gas piping
Oil trap
Indoor unit
Liquid
piping 6m/20ft
6m/20ft

Installation Manual Bosch Climate 5000 Series Four Way Cassette Ductless Single Split Air Conditioner / Heat Pump | 19
Bosch Thermotechnology Corp. |04.2019 Data subject to change
Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant piping connection. They must be
completely removed.
1. Hold the pipe at a downward angle to prevent burrs from falling into the
pipe.
2. Using a reamer or deburring tool, remove all burrs from the cut section of
the pipe.
Figure 27
Pipe
Reamer
Point down
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight seal.
1. After removing burrs from cut pipe, seal the ends with a piece of tape to
prevent foreign materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of pipe. Make sure they are facing in the
proper direction, because you can’t put them on or change their direction
after flaring. See Figure 28.
Figure 28
Flare nut
Copper pipe
4. Remove tape from ends of pipe when ready to perform flaring work.
5. Clamp flaring block on the end of the pipe. The end of the pipe must extend
beyond the edge of the flare form in accordance with the dimensions shown
in the Table 6.
Figure 29
Piping extension beyond flare form
Outerdiameter
of tubemm (in.)
Amm (in.)
Min. Max.
Ø 6.4 (Ø 0.25”) 0.7 (0.0275”) 1.3 (0.05”)
Ø 9.5 ( Ø 0.375”) 1.0 (0.04”) 1.6 (0.063”)
Ø 12.7 ( Ø 0.5”) 1.0 (0.04”) 1.8 (0.07”)
Ø 15.9 ( Ø 0.63”) 2.0 (0.078”) 2.2 (0.086”)
Table 6
Figure 30
Flaring tool
Tube
A
6. Place flaring tool onto the flaring block.
7. Turn the handle of the flaring tool clockwise until the pipe is fully flared.
8. Remove the flaring tool and flaring block, then inspect the end of the pipe
for cracks and even flaring. Slide the nut up to see if the flare is of proper
diameter and does not interfere with the threads in the flare nut.

20 |Bosch Climate 5000 Series Four Way Cassette Ductless Single Split Air Conditioner / Heat Pump Installation Manual
04.2019 |Bosch Thermotechnology Corp.
Data subject to change
Step 4: Connect pipes
When connecting refrigerant pipes, be careful not to use excessive torque or to
deform the piping in any way. You should first connect the low-pressure (suction)
pipe, then the high-pressure pipe (liquid line).
Minimum Bend Radius
When bending connective refrigerant piping, the minimum bending
radius is 10cm (4in). See Figure 31.
Figure 31
≥10cm (4in)Radius
NOTICE: EQUIPMENT DAMAGE
Make sure that no oil remains on plastic parts of the
decoration panel (accessories sold separately). Oil may
cause degradation and damage to plastic parts.
8.2 Connecting Piping to Indoor Unit
1. Align the center of the two pipes that you will connect. See Figure 32.
Figure 32
Indoor unit tubing Flare nut Pipe
2. Tighten the flare nut as tightly as possible by hand.
3. Using a wrench, grip the nut on the unit tubing.
4. While firmly gripping the nut on the unit tubing, use a torque wrench
to tighten the flare nut according to the torque values in the Torque
Requirements Table 7. Loosen the flaring nut slightly, then tighten again.
Figure 33
Torque requirements
Pipe
Gauge
Tightening
torque
Flaredimension (B)
(mm/inch) Flare shape
Min. Max.
Ø 6.4 18-20N.m
(183-204kgf.cm) 8.4/0.33 8.7/0.34
R0.4~0.8
45 °±2
90 °
±4
B
Ø 9.5 25-26 N.m
(255-265 kgf.cm) 13.2/0.52 13.5/0.53
Ø 12.7 35-36 N.m
(357-367 kgf.cm) 16.2/0.64 16.5/0.65
Ø 15.9 45-47 N.m
(459-480 kgf.cm) 19.2/0.76 19.7/0.78
Table 7
NOTICE: DO NOT USE EXCESSIVE TORQUE
Excessive force can break the nut or damage the refrigerant
piping. You must not exceed torque requirements shown in
the table above.